﻿#region Copyright information
// 
// Copyright © 2005-2013 Yongkee Cho. All rights reserved.
// 
// This code is a part of the Biological Object Library and governed under the terms of the
// GNU Lesser General  Public License (LGPL) version 2.1 which accompanies this distribution.
// For more information on the LGPL, please visit http://bol.codeplex.com/license.
// 
// - Filename: TaggableBase.cs
// - Author: Yongkee Cho
// - Email: yongkeecho@gmail.com
// - Date Created: 2013-01-25 3:25 PM
// - Last Modified: 2013-01-25 3:59 PM
// 
#endregion
using System;

namespace BOL.Models
{
    public class TaggableBase<TTag> : ITaggable<TTag>
    {
        #region Private variables

        private TTag _tag;

        #endregion

        public event EventHandler TagChanged;

        protected virtual void OnTagChanged(EventArgs e)
        {
            var handler = TagChanged;
            if (handler != null)
                handler(this, e);
        }

        public TTag Tag
        {
            get { return _tag; }
            set
            {
                if (!Equals(_tag, value))
                {
                    _tag = value;
                    OnTagChanged(EventArgs.Empty);
                }
            }
        }
    }
}
